Malicious PDF — malware analysis report

Static analysis result for SHA-256 3990b2b5cdd8f947…

MALICIOUS

PDF

47.5 KB Created: 2020-11-05 00:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8cc399d646640d7a1ade32eb5ba9a1ce SHA-1: 8b366451457b76fdf3119eda67af83a4c863540c SHA-256: 3990b2b5cdd8f947164ca006befd14db02155951bdc4543173ddd45b47e48958
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=maytag+washer+mvwb835dw3+manual In PDF document text
    • https://fogiboxumejak.weebly.com/uploads/1/3/4/5/134518377/3244f1427.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/186bee3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5ef76609-b5b0-415f-90e2-a6ff6d589d4e/sefubifobedipuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bf4216-0ce8-49fd-b848-54e266fc0e88/12842115450.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/batter_for_fried_banana_peppers.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/konosesesoribefabazilarod.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/human_anatomy_drawing_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/sciatic_nerve_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b102a21-38f5-411a-b433-faa87404cb15/5440047940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1812cb32-15f0-40a3-abda-6488872806e6/pesil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0e3ef6-687e-455f-aa30-05d94b3e342b/71101283700.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000680c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 5844 bytes
SHA-256: 093ba8698c37cbf7a26a4dddeabee83fc898d56a48b1ba5cfaee5ce777e84e62
font_01_sfnt_off00007bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDB 11536 bytes
SHA-256: 8254c02c4dd99956f9ae72ad5e3e88ce71498b6ff07916489fd27da607112f33
font_02_sfnt_off0000a32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA32A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c